Thermo King SB-210, Manual

Page: 120 / 159

Refrigeration Service Operations
120
6. Inspect the check valve seat in the three-way
valve.
7. If replacement parts are needed, a kit
P/N 60-163 must be used which includes the
piston, spring, O-ring, valve stem, and snap
ring.
Installation
1. Coat the O-ring with compressor oil and
install it on the check valve stem.
2. Insert the spring into the hole in the check
valve stem and then install the piston on the
other end of the spring with the hole in the
piston towards the spring.
3. Coat the entire assembly with compressor oil
and install the assembly into the check valve
seat in the three-way valve.
4. Screw the check valve stem into the three-way
valve until the snap ring can be installed.
5. Install the snap ring.
6. Unscrew (back seat) the check valve stem
against the snap ring.
NOTE: The valve stem must be back seated
during normal unit operation.
7. Coat the sealing area in the cap with
compressor oil, install and tighten the cap on
the three-way valve.
8. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
9. Recharge the unit with the proper refrigerant.
Pilot Solenoid
Removal
1. Recover the refrigerant charge.
2. Disconnect the wires and remove the coil from
the valve.
3. Unsolder the refrigeration lines.
4. Remove the mounting bolts and remove the
valve.
Installation
1. Remove the coil from the valve.
2. Place the valve in the unit and install the
mounting bolts. The arrow on the valve
indicates the direction of flow through the
valve. Make sure that the arrow points in the
proper direction.
3. Solder the refrigeration lines to the valve.
4. Install the coil and connect the wires.
5. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
6. Recharge the unit with the proper refrigerant
and check the compressor oil.
Suction Vibrasorber
Removal
1. Pump down the low side and equalize pressure
to slightly positive.
2. Unsolder the suction vibrasorber from the
suction service valve. Unsolder the connection
to the accumulator and remove the vibrasorber
from the unit.
Installation
1. Prepare the suction vibrasorber and tube
fittings for soldering by cleaning the
thoroughly.
2. Solder the vibrasorber to the suction service
valve.
CAUTION: The piston must be inserted
with the flat side against the valve seat to
ensure proper sealing.